The Chinese word for uniform is
校服

xiào fú

Chinese Definition

uniform
1. 制服；军服；一样的；相同的；一致的
Components
校
1. school; college; university
軍校 - military school
2. (military) field officer
3. (historical) horsekeeper official
4. to proofread; to check; to compare
5. (printing) proof
6. (Cantonese) to adjust
校gaau3 返啱隻錶 - to adjust a watch to the correct time
服
1. (zh-no-solo) clothes; garment
衣服 - clothes
校服 - school uniform
2. mourning dress
3. to wear; to put on
4. to take; to eat
服藥 - to take medicine
服用 - to take medicine
服毒 - to take poison
每日服三次。 - Take it three times a day.
5. to serve
客服 - customer service
服兵役 - to serve in the army
服刑 - to serve a sentence
6. to submit; to agree; to accept; to obey
不服 - to refuse to accept
7. (Used to express defeat even though one is not convinced of the opposing arguments)
服了你了。 - You win.
我真係服咗你。 - Come on, I surrender.
8. to convince; to persuade
9. to be accustomed to
10. (gaming) Short for 伺服器; server
11. (historical) inner pair of horses among the four that pull an imperial carriage
Fu

制服
1. v. to subdue; to overpower
2. n. (clothing) uniform
3. v. (literary) to regulate what one is allowed to wear (depending on social status)
4. n. (literary) mourning garment